SPECIAL EFFECTS

ROLL
Produced by fast alternating strokes from two drum sticks.

GILSSANDO
More applicable to the timpani. The pitch is moved up or down by varying the pedal at the foot of the instrument after the note is sounded, giving a sliding effect.

SEC
Means 'dry'. The sound is stemmed immediately after it has been sounded.

LAISSEZ VIBRER
Meaning 'to vibrate freely'. This indicates that the sound produced is allowed to vibrate freely till it dies away.